OpenProject is the leading open source project management software.
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openproject/app/helpers/pagination_helper.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See doc/COPYRIGHT.rdoc for more details.
#++
require 'will_paginate'
module PaginationHelper
def pagination_links_full(paginator, options = {})
merged_options = { next_label: I18n.t(:label_next),
previous_label: I18n.t(:label_previous),
container: true }.merge(options)
html = ''.html_safe
if paginator.total_entries > 0
html << will_paginate(paginator, merged_options.merge(container: false))
html << content_tag(:span, "(#{paginator.offset + 1} - #{paginator.offset + paginator.length}/#{paginator.total_entries})", class: 'range')
if per_page_links && links = per_page_links(paginator.per_page, merged_options[:params] || params)
html << links
end
end
merged_options[:container] ?
content_tag(:p, html, class: 'legacy-pagination') :
html
end
def per_page_links(selected = nil, options = params)
links = Setting.per_page_options_array.map { |n|
n == selected ?
content_tag(:span, n, class: 'current') :
link_to_content_update(n, options.merge(page: 1, per_page: n))
}
content_tag :span, class: 'per_page_options' do
links.size > 1 ? l(:label_display_per_page, links.join(', ')).html_safe : nil
end
end
# Returns page option used for pagination
# based on:
# * offset
# * limit
# * page
# parameters.
# Preferes page over the other two and
# calculates page in it's absence based on limit and offset.
# Return 1 if all else fails.
def page_param(options = params)
page = if options[:page]
options[:page].to_i
elsif options[:offset] && options[:limit]
begin
# + 1 as page is not 0 but 1 based
options[:offset].to_i / per_page_param(options) + 1
rescue ZeroDivisionError
1
end
else
1
end
page > 0 ?
page :
1
end
# Returns per_page option used for pagination
# based on:
# * per_page session value
# * per_page options value
# * limit options value
# in that order
# Return smallest possible setting if all else fails.
def per_page_param(options = params)
per_page_candidates = [options[:per_page].to_i, session[:per_page].to_i, options[:limit].to_i]
unless (union = per_page_candidates & Setting.per_page_options_array).empty?
session[:per_page] = union.first
union.first
else
Setting.per_page_options_array.sort.first
end
end
end